package com.itheima.mapper;

import com.itheima.domain.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;
@Mapper
public interface DeptMapper {
    //方式一：通过@Results 注解指定结果集
  /*  @Results({
            @Result(column = "create_time", property = "createTime"),
            @Result(column = "update_time", property = "updateTime")
    })
    @Select("select id, name, create_time, update_time from dept order by update_time desc")*/
    //方式二：通过sql起别名
   /* @Select("select id, name, create_time as createTime, update_time as updateTime from dept order by update_time desc")*/
    //方式三：开启驼峰命名映射的开关
    @Select("select id, name, create_time, update_time from dept order by update_time desc")
    List<Dept> selectAll();


    @Delete("delete from dept where id=#{id}")
    void deleteById(Integer id);

    @Insert("insert into dept(name, create_time, update_time) values(#{name}, #{createTime}, #{updateTime})")
    void add(Dept dept);

    @Select("select id, name, create_time, update_time from dept where id=#{id}")
    Dept selectById(Integer id);

    @Update("update dept set name=#{name}, update_time=#{updateTime} where id=#{id}")
    void updateById(Dept dept);
}
